the value to which this map maps the specified key, or null if the map contains no mapping for this key

See Also:

Map.containsKey(Object)

getAll

public java.util.Map getAll(java.util.Collection colKeys)

Deprecated.

Get all the specified keys, if they are in the cache. For each key that is in the cache, that key and its corresponding value will be placed in the map that is returned by this method. The absence of a key in the returned map indicates that it was not in the cache, which may imply (for caches that can load behind the scenes) that the requested data could not be loaded.

Note: this implementation does not differentiate between missing keys or null values stored in the back map; in both cases the returned map will not contain the corresponding entry.

previous value associated with specified key, or null if there was no mapping for key. A null return can also indicate that the map previously associated null with the specified key, if the implementation supports null values.

incrementVersion

lock

public boolean lock(java.lang.Object oKey,
long lMillis)

Deprecated.

Attempt to lock the specified item within the specified period of time. Expensive: Locking always occurs on the back cache, and removes the value from the front cache if successful (forcing a get() from the back cache on next access to the key).